docs: fix remaining stale version refs across 4 pages

- quick-start.html: next-card eyebrow v0.1→v2.0 → v0.1→v2.3
- roadmap.html: og:title v0.1 to v2.0 → v0.1 to v2.3
- strategies.html: hero badge 'current as of v2.0' → 'current as of v2.3'
- languages.html: extractor test count 177 → 162 (actual current count)

Author: manojmallick

docs/languages.html

@@ -150,7 +150,7 @@ <h1>21 languages.<br>Zero install.</h1>
       <div class="lang-stat"><span class="lang-stat-val">21</span><span class="lang-stat-lbl">Languages</span></div>
       <div class="lang-stat"><span class="lang-stat-val">25</span><span class="lang-stat-lbl">Max sigs/file</span></div>
       <div class="lang-stat"><span class="lang-stat-val">0</span><span class="lang-stat-lbl">npm packages</span></div>
-      <div class="lang-stat"><span class="lang-stat-val">177</span><span class="lang-stat-lbl">Tests passing</span></div>
+      <div class="lang-stat"><span class="lang-stat-val">162</span><span class="lang-stat-lbl">Tests passing</span></div>
     </div>
   </div>
 </div>

docs/quick-start.html

@@ -486,7 +486,7 @@ <h2>Explore further</h2>
       <div class="next-card-desc">Stack both tools for the two-layer caching strategy. SigMap for daily; Repomix for deep sessions.</div>
     </a>
     <a class="next-card" href="roadmap.html">
-      <div class="next-card-ey">v0.1 → v2.0</div>
+      <div class="next-card-ey">v0.1 → v2.3</div>
       <div class="next-card-title">Full roadmap</div>
       <div class="next-card-desc">All major versions shipped. 97% token reduction. 325 tests. MIT license.</div>
     </a>

docs/roadmap.html

@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width,initial-scale=1.0">
 <title>Roadmap — SigMap</title>
 <meta name="description" content="SigMap shipped v0.1 through v2.3 — 20 versions, 97% token reduction, 325 tests. Full visual timeline from baseline to complete system.">
-<meta property="og:title" content="SigMap Roadmap — v0.1 to v2.0 complete">
+<meta property="og:title" content="SigMap Roadmap — v0.1 to v2.3 complete">
 <meta property="og:description" content="20 versions shipped. 97% token reduction. 325 tests. MIT license. See how SigMap was built from first extractor to full enterprise system.">
 <meta property="og:url" content="https://manojmallick.github.io/sigmap/roadmap.html">
 <meta name="twitter:card" content="summary_large_image">

docs/strategies.html

@@ -130,7 +130,7 @@
 
 <div class="page-hero">
   <div class="hero-inner">
-    <div class="hero-badge">strategy guide — current as of v2.0</div>
+    <div class="hero-badge">strategy guide — current as of v2.3</div>
     <h1>Choose the right context strategy</h1>
     <p class="hero-sub">SigMap supports three modes: full, per-module, and hot-cold. This page shows exactly when to use each one, what token cost to expect, and how MCP changes the decision.</p>
   </div>